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Samantha Highfill
May 20, 2014 AT 06:41 PM EDT

Marlene King’s got a secret. Can you keep it?

The Pretty Little Liars showrunner is on board to adapt Danielle Vega’s upcoming horror novel, The Merciless, for the big screen. The novel, which was inspired by real events, follows a new student in town as she gets to know the popular clique in high school. Not unlike Pretty Little Liars, the popular clique turns out to have a darker side. But this time, the new girl participates in a dangerous exorcism of another classmate. So perhaps the Liars should be thankful their biggest worry is a cyber bully.

The Merciless is set to hit shelves on June 12, 2014 with Lionsgate having acquired the feature film rights.

Check out Marlene King’s tweet about the exciting news below:

It’s official-I’m teaming up with @lionsgatemovies @alloyent to write the feature #TheMerciless. I promise it’ll scare the DEVIL out of you.

— I. Marlene King (@imarleneking) May 20, 2014

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